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ActBlue

ActBlue supports parameterization of all of the most common fields that can be used to make entering data easier for your contact. When the link redirects to ActBlue, data provided will be auto-filled into the forms.

Supported field merge fields for ActBlue include:

Street address does not seem to be supported. Neither are employer or occupation.

Enter your base URL and campaign

It will look something like this: https://secure.actblue.com/donate/mek-ads-mar21

Add Parameters

Add the ? mark to your URL and then enter a parameter name from the above list (phone, firstname, city) etc.

https://secure.actblue.com/donate/mek-ads-mar21?firstname=

Then select the Prompt Field Merge value that corresponds.

Additional parameters can be added with the & operator:

https://secure.actblue.com/donate/mek-ads-mar21?firstname={first}&lastname={last}&amount=50

Your fully parameterized link may look something like this depending on the names of your associated data fields: